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Offline jonas_sthlm  
#1 Posted : 05 April 2024 12:31:11(UTC)
jonas_sthlm

Sweden   
Joined: 12/10/2008(UTC)
Posts: 899
Location: Stockholm, Södermalm
Hi

Has anyone manage connect an capacitor on mLD decoder ?

I get the capacitor 1500uF to charge U-/U+ but the decoder dies immediately when the power goes off.


I find this wiring diagram on moba-hgh.de Huh

Edited by user 06 April 2024 09:49:35(UTC)  | Reason: Not specified

Collecting Swedish items since the 80s / CS3+ / MSW / 60175 Booster / 60881 S88 AC / TC10 Gold / K, C-Tracks / Favorites Class Ra / modelltag.se - Forum modelltag.se - Facebook modelltag.se - YouTube
Offline bph  
#2 Posted : 05 April 2024 13:32:31(UTC)
bph

Norway   
Joined: 04/08/2018(UTC)
Posts: 1,004
Should work....

Could it be that something is not wired correctly. ? e.g. is the diode mounted the right way?
this thread might also help: (the instructions on the moba-hgh.de is not the best)
https://www.marklin-users.net/forum/posts/t31226-Marklin-Hobby-and-Trix-22075---22097---mSD-upgrade--buffer-capacitor
Offline jonas_sthlm  
#3 Posted : 05 April 2024 15:10:15(UTC)
jonas_sthlm

Sweden   
Joined: 12/10/2008(UTC)
Posts: 899
Location: Stockholm, Södermalm
I probably didn't connect it wrong Blushing I used this instruction...

UserPostedImage

The same capacitor works with mSD decoder so why not with mLD.... I dont get it Confused

UserPostedImage
Collecting Swedish items since the 80s / CS3+ / MSW / 60175 Booster / 60881 S88 AC / TC10 Gold / K, C-Tracks / Favorites Class Ra / modelltag.se - Forum modelltag.se - Facebook modelltag.se - YouTube
thanks 1 user liked this useful post by jonas_sthlm
Offline jonas_sthlm  
#4 Posted : 05 April 2024 21:25:09(UTC)
jonas_sthlm

Sweden   
Joined: 12/10/2008(UTC)
Posts: 899
Location: Stockholm, Södermalm
Someone has succeeded here making it to work with 470yF/35V together with PCB Mellow

Should this capacitor be requested between GND and +Ub if not using 21MTC PCB for mLD/mSD...

UserPostedImage

Edited by user 07 April 2024 11:10:03(UTC)  | Reason: Not specified

Collecting Swedish items since the 80s / CS3+ / MSW / 60175 Booster / 60881 S88 AC / TC10 Gold / K, C-Tracks / Favorites Class Ra / modelltag.se - Forum modelltag.se - Facebook modelltag.se - YouTube
Offline bph  
#5 Posted : 06 April 2024 22:03:46(UTC)
bph

Norway   
Joined: 04/08/2018(UTC)
Posts: 1,004
Perhaps you also need a capacitor on the +5v for the decoder processor. ?
I have not used capacitors on old mLD but only used them on mSD and as you also noticed it works fine.
Offline mmervine  
#6 Posted : 06 April 2024 23:04:31(UTC)
mmervine

United States   
Joined: 30/01/2006(UTC)
Posts: 1,884
Location: Keene, NH
This video may be helpful:

Märklin C-track, Marklin Digital & ECoS, multi-era French & Swiss
http://www.ete-ene.org/m...mervines-layout-gallery/
thanks 1 user liked this useful post by mmervine
Offline jonas_sthlm  
#7 Posted : 07 April 2024 13:32:25(UTC)
jonas_sthlm

Sweden   
Joined: 12/10/2008(UTC)
Posts: 899
Location: Stockholm, Södermalm
The video is great but doesn't clarify functionality of mLD decoders...

Like I mentioned the powerpack works with the same generation of mSD decoder.

Yes the question are, and I will try decoder with circuit board later to see if the +5 capacitors will do the magic Huh

By the way how do you know its +5 on the board ?
Collecting Swedish items since the 80s / CS3+ / MSW / 60175 Booster / 60881 S88 AC / TC10 Gold / K, C-Tracks / Favorites Class Ra / modelltag.se - Forum modelltag.se - Facebook modelltag.se - YouTube
thanks 1 user liked this useful post by jonas_sthlm
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